A Nature study shows sperm from older fathers carry more disease-linked mutations, revealing how age and cell competition ...

CHICAGO (Reuters) - U.S. researchers have found a way to coax human embryonic stem cells to turn into the types of cells that make eggs and sperm, shedding light on a stage of early human development ...

New work from UC Davis and the University of Utah shows how the 3D structure of DNA inside a germ cell commits it to develop into a sperm cell. The discovery could improve understanding of fertility ...

To enable our fingernails to grow or new skin to form and heal an injury, our cells make copies of themselves — exact duplicates containing the same DNA, the combination of 46 chromosomes that makes ...

The report of sperm cells created from skin cells may appear amusing at first blush. I was certainly guilty of a reflexive guffaw, which was promptly replaced by shame as I realize what it meant for ...

When it comes to having children, although many people prefer to have kids later in life, there are some risks that come ...

A new mRNA approach successfully restored sperm production and led to the birth of viable offspring in a genetic mouse model.

Early lab work shows reprogrammed skin cells can yield embryos, hinting at future infertility solutions but raising safety ...

For species that rely on sexual reproduction, including mice and men, offspring can only happen if sperm from the male fertilize eggs from the female. Even artificial fertilization techniques depend ...

Among those causes are gametes that don't function properly, whether that's the sperm, the ova, or a combination of both.